Diffuse systemic sclerosis and autoimmune hepatitis: a unique association.

Area of Science:

• Hepatology
• Immunology
• Rheumatology

Background:

• Autoimmune hepatitis (AIH) is a chronic liver disease causing inflammation and liver cell damage.
• Systemic sclerosis is a connective tissue disease, and its association with AIH is rare, with only nine prior reports.
• Previous cases exclusively involved the limited cutaneous form of systemic sclerosis.

Observation:

• This report details the first patient diagnosed with diffuse systemic sclerosis who also presented with AIH.
• The patient exhibited positive antimitochondrial antibodies, a marker often associated with certain autoimmune liver diseases.
• The patient experienced a significant positive response to immunosuppressive drug treatment.

Findings:

• The case demonstrates that AIH can occur in patients with the diffuse form of systemic sclerosis.
• Antimitochondrial antibody positivity in this context suggests a potential link or shared autoimmune pathways.
• Immunosuppressive therapy proved effective in managing AIH in this patient with diffuse systemic sclerosis.

Implications:

• This finding expands the known clinical spectrum of systemic sclerosis-associated AIH.
• It highlights the importance of considering AIH in patients with diffuse systemic sclerosis, even with atypical antibody profiles.
• The successful response to immunosuppression suggests similar treatment strategies may benefit other patients with this rare comorbidity.